# SN75LBC176DR

**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-8

SN75LBC176DR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | R | output | Receiver logic output carrying the RS-485 receive data; the receiver output current is limited to ±10 mA (absolute maximum). |
| 2 | RE | input | Active-low receiver enable: driving RE low enables the receiver, and driving it high puts R in the high-impedance state. |
| 3 | DE | input | Active-high driver enable: the driver outputs A and B are active when DE is high and are high-impedance when DE is low. |
| 4 | D | input | Driver logic input carrying the RS-485 transmit data, with VIH of at least 2 V and VIL of at most 0.8 V. |
| 5 | GND | power_in | Ground reference for the device; all voltages other than the differential bus voltage are referenced to this network ground terminal. |
| 6 | A | bidirectional | Non-inverting RS-485 bus terminal (differential I/O port A) with a bus voltage range of −7 V to 12 V recommended and −10 V to 15 V absolute maximum. |
| 7 | B | bidirectional | Inverting RS-485 bus terminal (differential I/O port B) with a bus voltage range of −7 V to 12 V recommended and −10 V to 15 V absolute maximum. |
| 8 | VCC | power_in | 5 V supply pin; the recommended supply range is 4.75 V to 5.25 V and the absolute maximum is 7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SN75LBC176DR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `sn75lbc176dr-etched.step` / `sn75lbc176dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn75lbc176dr.step` / `sn75lbc176dr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/sn75lbc176.pdf) (29 pp, sha256 `a708c623b041ca86`, retrieved 2026-10-08, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sn75lbc176dr-datasheet.pdf)